- Replace DynInterfaceFilter with ForwardRequirements for per-IP forward
precision with source-subnet iptables filtering for private forwards
- Add WildcardListener (binds [::]:port) to replace the per-gateway
NetworkInterfaceListener/SelfContainedNetworkInterfaceListener/
UpgradableListener infrastructure
- Update forward-port script with src_subnet and excluded_src env vars
- Remove unused filter types and listener infrastructure from gateway.rs
- Add availablePorts migration (IdPool -> BTreeMap<u16, bool>) to alpha.20
- Complete version bump to 0.4.0-alpha.20 in SDK and web
2a54625f43